How can I convert a UDO variable from string to array?

Is it possible to do the opposite (IE, convert an array to a string)? We have our product_sku variable as an array site-wide even when there's only one product and one vendor is taking issue with this and what's us to pass it as a string.

The character being what you want to use to separate the entires (normally provided in the tags documentation). You would then scope this extension to just that tag so this modification would only take place in the scope of this tag and therefore would not affect your other tags.